I have a SONY DRU 700A and a Memorex 3202-3298 burner. Both are USB.
I cannot get them to reliably work at the same time. Using a time-consuming process (uninstall both, reboot, install one, reboot, install the other) they sometimes both work. But even then the Memorex will 'disappear' spontaneously, and almost always after a reboot.
Neither burner came with a driver, so they are both using the default Microsoft driver.
I am running Windows XP, Service Pack 3.
Any suggestions gratefully received.